CN1724222A - Electric hammer drill - Google Patents

Electric hammer drill Download PDF

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Publication number
CN1724222A
CN1724222A CNA200510064739XA CN200510064739A CN1724222A CN 1724222 A CN1724222 A CN 1724222A CN A200510064739X A CNA200510064739X A CN A200510064739XA CN 200510064739 A CN200510064739 A CN 200510064739A CN 1724222 A CN1724222 A CN 1724222A
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CN
China
Prior art keywords
mentioned
cylinder
pattern
tool bit
drill
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Granted
Application number
CNA200510064739XA
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Chinese (zh)
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CN100366397C (en
Inventor
新间康智
岩上润一
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Makita Corp
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Makita Corp
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Publication of CN1724222A publication Critical patent/CN1724222A/en
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Publication of CN100366397C publication Critical patent/CN100366397C/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/003—Crossed drill and motor spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/068—Crank-actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/065—Details regarding assembling of the tool

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)

Abstract

A kind of electric percussion drill provides the technology that reduces the vibration in the electric hammer drill.In electric hammer drill (101), has the 1st Poewr transmission mechanism (131) that the rotation output transform of drive motor (111) is in line and moves and tool bit (115) is carried out percussion action, tool bit is rotated the 2nd Poewr transmission mechanism (141) of action, can in the gears engaged of keeping the 2nd Poewr transmission mechanism, pass to the rotation of motor side the power delivery status of tool bit side, and the power that blocks the rotation transmission blocks the powershift mechanism (151) of switching between the state, be configured in main part (103) upper surface side, carry out the pattern switching mechanism (161) of switching of the pattern of tool bit, be configured between pattern switching mechanism (161) and the powershift mechanism (151), when the pattern switching mechanism switches to the percussion drill pattern, mechanism switches to power delivery status powershift, when the pattern switching mechanism switches to conflicting model, powershift mechanism is switched to the connect mechanism (171) that power blocks state.

Description

Electric hammer drill
Technical field
The present invention relates to a kind of electric hammer drill, for example can and be undertaken switching between the percussion drill pattern of drilling operation at the conflicting model of the engraving tool cutter processing operation of only carrying out machined material (concrete) by the percussion action of tool bit by the composite move of the percussion action of tool bit and spinning movement.
Background technology
The electric hammer drill that can between conflicting model and impact, drill jig formula, carry out the switching of pattern, for example, open in TOHKEMY 2002-192481 communique.In the electric hammer drill of the prior art, via electric motor driven crank mechanism piston is moved back and forth in cylinder, come linearity ground to drive through air spring and impact son, on tool bit, transmit percussion action through dynatron.Except above-mentioned formation, above-mentioned electric hammer drill also has rotary transfer machine, is used for transmitting to tool bit through cylinder and instrument retaining member from jackshaft the rotation of motor.Rotary transfer machine is provided with clutch mechanism, and this clutch mechanism passes to tool bit to the rotation of motor by the pawl of engaged clutch; Block rotation transmission by the engagement of removing pawl to tool bit.Above-mentioned in addition electric hammer drill also has pattern switching mechanism portion, is used for that clutch mechanism is rotated transmit mode and rotation and blocks switching between the state.When pattern switching mechanism portion is switched to conflicting model and blocks the rotation of tool bit, can only process operation by the percussion action of tool bit, when pattern switching mechanism portion is switched to impact, drill jig formula, thereby when the tool bit transmission is rotated, can process operation by the percussion action of tool bit and the composite move of spinning movement.
; the cylinder in the tool body portion of electric hammer drill and the mutual axis of motor are configured under the occasion of L font roughly; usually, the position of centre of gravity of this electric hammer drill is positioned at the below of cylinder-bore axis and near the front side a little of the axis of motor.Operator grasps is configured in the handle of opposition side of tool bit and the processing operation that side grip is stipulated, at this moment, position of centre of gravity leaves the axis of cylinder more, and the vibration of fore-and-aft direction (axis direction of cylinder) or above-below direction is just big more.In above-mentioned TOHKEMY 2002-192481 communique in the disclosed technology, rotary transfer machine passes to cylinder (tool bit) with the rotation of motor, the jackshaft of this rotary transfer machine is configured on the position of below of the place ahead of this motor and cylinder, then the clutch mechanism that is used to transmit or block rotation is set in this jackshaft, again the pattern switching mechanism portion of the engagement of handover operation clutch mechanism or releasing be configured in this clutch mechanism near.Like this, in the occasion of the handle member centralized configuration relevant in a place with the switching of the pattern of tool bit, the weight of the lower zone of the axis of cylinder increases more, the weight balancing variation, and the position of centre of gravity of electric hammer drill leaves the axis of cylinder downwards more.Thus, when considering generation of vibration, disclosed technology is difficult to be called rational structure in TOHKEMY 2002-192481 communique.Pattern switching mechanism portion is configured on a side the side of tool body portion with in fact being standing shape in addition, and is also undesirable from appearance looks elegant.
Summary of the invention
In view of the above problems, the objective of the invention is to, a kind of technology that helps reducing the vibration of electric hammer drill is provided.
In order to achieve the above object, constituted the described invention of each technical scheme.
Electric hammer drill as technical scheme 1 described invention has: main part, be housed in motor in the main part, be configured in the main part front end area tool bit, tool bit axially on rectilinear motion, make this tool bit carry out impact of percussion action thus, accommodate the cylinder that impacts son in the mode that can slide relatively, the rotation output of converting motor passes to the 1st Poewr transmission mechanism that impacts son after becoming rectilinear motion.Rotation output as converting motor becomes straight-line mechanism, typically uses crank mechanism, but also extensively comprises wobbler mechanism or cam mechanism etc.About motor and cylinder, no matter be that mutual axis is configured to cross-like in addition, still mutual axis being configured to parallel shape can.
In addition, electric hammer drill of the present invention also has the 2nd Poewr transmission mechanism and powershift mechanism, and the 2nd Poewr transmission mechanism is exported through the engagement of driven wheel and driven gear and by the rotation of motor and made tool bit around axis rotation; Above-mentioned powershift mechanism keeps the engagement of the driven wheel and the driven gear of the 2nd Poewr transmission mechanism, can block the powershift mechanism of switching between the state at the power that pass to the rotation of motor side the power delivery status of tool bit side and block the rotation transmission simultaneously." powershift mechanism " of the present invention, typically the snap action by pawl obtains power delivery status, obtains power by the engaging of removing pawl and blocks state, is so-called engaged clutch, but also comprises other clutch such as friction clutch.
Have again, electric hammer drill of the present invention, have pattern switching mechanism and connect mechanism, this pattern switching mechanism is configured in the main part upper surface side, with the percussion drill pattern of the composite move driven tool drill bit of percussion action and spinning movement with only switch between the conflicting model with percussion action driven tool drill bit; Above-mentioned connect mechanism is configured between this pattern switching mechanism and the powershift mechanism, when the pattern switching mechanism is switched to the percussion drill pattern, mechanism switches to power delivery status powershift, when the pattern switching mechanism is switched to conflicting model, powershift mechanism is switched to power block state.And connect mechanism extends along the side face of cylinder, thereby and the axial of cylinder passed to powershift mechanism to the pattern change action of pattern switching mechanism as direction of action.
When the operator switched to impact, drill jig formula to the pattern switching mechanism, the connect mechanism through moving on the long axis direction of cylinder switched to power delivery status to powershift mechanism.Under this state, the rotation of motor passes to tool bit through the 2nd Poewr transmission mechanism.For this reason, tool bit by by the 1st Poewr transmission mechanism via the percussion action of the linearity that impacts son with by the action drives of the composite-like of the spinning movement of the 2nd Poewr transmission mechanism.On the other hand, when the pattern switching mechanism was switched to conflicting model, powershift mechanism was switched into power and blocks state via connect mechanism.Under this state, the rotation of motor does not pass to tool bit, and tool bit is only driven via the percussion action that impacts sub-linearity from the 1st Poewr transmission mechanism.
In the present invention, by the pattern switching mechanism of operator's handover operation with switch to power delivery status or power blocks between the powershift mechanism of state and exists by the side face of cylinder and the connect mechanism that extends, the pattern change action of pattern switching mechanism is passed to powershift mechanism through this connect mechanism.Thus, pattern switching mechanism and powershift mechanism can be configured in the position of leaving mutually.For example, in the occasion that the pattern switching mechanism is configured in the upper surface side of main part, the axis of the best gripper cylinder of powershift mechanism and to be configured in opposition side be downside.By the pattern switching mechanism being configured on the main part upper surface that leaves powershift mechanism, can make the axis of the position of centre of gravity of electric hammer drill near cylinder, the electric hammer drill of the vibration of fore-and-aft direction in the time of thus, providing effective reduction processing operation (cylinder axially) or above-below direction.In the time of in addition on electric hammer drill being placed on ground etc., be placed with the state that main part is laid across usually.For this reason; when the pattern switching mechanism is arranged on the side of main part; might directly contact by this pattern switching mechanism with ground; thereby switch mode unexpectedly; but as in the present invention, when the pattern switching mechanism is configured in the upper face side of main part, can avoid this pattern switching mechanism to contact with ground etc.; can the protected mode switching mechanism, can prevent that unexpected pattern from switching simultaneously.
In addition, in the present invention,, compare, can irrespectively operate this pattern switching mechanism easily, improved convenience with the situation of operator's habitual hand with the occasion that is configured in the main part side by the pattern switching mechanism is configured in the main part upper face side.For example, adopting certain structure, being used for being configured in occasion on the axle identical with cylinder to tool bit transmission or the powershift mechanism of blocking the rotation of motor, this powershift mechanism, can maximize because of the relation of the outer regions that is configured in cylinder, and weight increases, and employing the present invention, owing to powershift mechanism is not arranged on the cylinder-bore axis, so might himself miniaturization, simultaneously guarantee receiving space easily, can seek the densification of electric hammer drill integral body effectively.
If adopt technical scheme 2 described inventions, connect mechanism in the technical scheme 1 described electric hammer drill has cylindrical member, this cylindrical member is configured to surround the shape on every side of cylinder, and can moving axially to this cylinder, and, cylinder axially pass to cylindrical member via a plurality of relaying members as the pattern change action of the pattern switching mechanism of direction of action, thereby wherein above-mentioned relaying member gripper cylinder is configured in both sides.For this reason, cylindrical member is moved keeping under the state of balance, can be along moving under the stable status of the axis of cylinder, and then can obtain the stable action of powershift mechanism.In addition, by coming the transfer mode change action, can shorten the axial length of cylindrical member, to seek alleviating of weight via the relaying member as far as possible.At this, so-called " cylinder axially as the pattern change action of the pattern switching mechanism of direction of action ", except the state that the axial linearity ground along cylinder moves, also comprise the operating state of axial component motion with cylinder.
Adopt as technical scheme 3 described inventions, cylindrical member as technical scheme 2 described electric hammer drills has cam member, when this cam member with cylindrical member during to the moving axially of cylinder, powershift mechanism is switched to power delivery status or power blocks state by mobile component with the direction of this axial quadrature.According to this structure, in the mutually orthogonal configuration structure of the rotation of the axis of cylinder and the 2nd Poewr transmission mechanism, powershift mechanism for example is made of the engaged clutch on the rotation that is arranged on the 2nd Poewr transmission mechanism, by this engaged clutch moving vertically, can be used to effectively rotate and be transmitted or the electric hammer drill of intercepted form.
According to the present invention, can provide the technology that is beneficial to the vibration that reduces electric hammer drill.
Description of drawings
Fig. 1 is the integrally-built cutaway view of the electric hammer drill of expression present embodiment.
Fig. 2 is the cutaway view of major part of the electric hammer drill of expression present embodiment, mainly represents the clutch switching mechanism, the state of expression clutches engaged.
Fig. 3 is the cutaway view of major part of the electric hammer drill of expression present embodiment, mainly represents the clutch switching mechanism, the state that the expression clutches engaged is disengaged.
Fig. 4 is the cutaway view of the ring element in the expression clutch switching mechanism.
Fig. 5 is that arrow A among Fig. 4 is to view.
The specific embodiment
According to Fig. 1～Fig. 4 embodiments of the present invention are described below.The overall structure of in Fig. 1, having represented the electric hammer drill 101 (below abbreviate percussion drill as) of present embodiment.Fig. 2 and Fig. 3 represent the major part of electric hammer drill 101, and Fig. 4 is the figure of the ring element of the expression connect mechanism that makes clutch mechanism action according to the motor change action.As shown in Figure 1, put it briefly, the instrument folder 113 of the instrument retaining member that the electric hammer drill 101 of present embodiment is connected based on the main part 103 of the verandah that constitutes electric hammer drill 101, as the front end area with this main part 103, load and unload and be mounted freely on this instrument and press from both sides the drill hammer 115 on 113 and constitute.Drill hammer 115 is retained as with respect to instrument folder 113 and can slides relatively on axially and at the confined state that relatively rotates on its circumferencial direction at it.Drill hammer 115 is corresponding with " tool bit " among the present invention.
Main part 103 comprises: accommodated the motor casing 105 of drive motor 111, the crank shell 106 of having accommodated motion changing mechanism 131 and impact components 117, the gear casing 107 of having accommodated Poewr transmission mechanism 141, handle 109.Drive motor 111 is corresponding with " motor " among the present invention, and motion changing mechanism 131 is corresponding with " the 1st Poewr transmission mechanism " among the present invention.Drive motor 111 be configured to rotating shaft 111a along with axially (that is, drill hammer 115 axially) of main part 103 longitudinal direction of quadrature (above-below direction among Fig. 1) roughly.After being transformed into rectilinear motion by motion changing mechanism 131, the rotation output of drive motor 111 passes to impact components 117, through the impulsive force of these impact components 117 generations to the long axis direction (left and right directions among Fig. 1) of drill hammer 115.Motion changing mechanism 131 is by constituting through the crank mechanism that a plurality of gears 132,134 drive from drive motor 111.Crank mechanism by bent axle 133, be arranged on crank-pin 135, piston 137 on this bent axle 133, the connecting rod 139 etc. that connects this instrument folder 137 and crank-pin 135 constitutes.Piston 137 is the members that drive impact components 117, can slide to the direction identical with the long axis direction of drill hammer 115 in cylinder 121.Drive motor 111 and cylinder 121 are configured to roughly quadrature of mutual axis.
Impact components 117 mainly constitutes by hammer 118 with as the impulse member 119 of dynatron, and described hammer 118 is configured on the thorax inwall of cylinder 121 and with respect to this thorax inwall free sliding with piston 137; Described impulse member 119 is configured on the instrument folder 113 and can presss from both sides 113 free slidings with respect to this instrument, and the kinergety of hammer 118 is passed to drill hammer 115.Hammer 118 is corresponding with " impacting son " of the present invention.
On the other hand, instrument folder 113 is arranged on cylinder 121 coaxial upward also rotatable, and this instrument folder 113 is by Poewr transmission mechanism 141 driven rotary that constitute via gear train from drive motor 111.Poewr transmission mechanism 141 is corresponding with " the 2nd Poewr transmission mechanism " of the present invention.On Poewr transmission mechanism 141, clamp clutch mechanism 151, can pass to instrument folder 113 to the rotation of drive motor 111 or it is blocked through this clutch mechanism 151.Clutch mechanism 151 is corresponding with " powershift mechanism " of the present invention.
As shown in Figures 2 and 3, in Poewr transmission mechanism 141, the rotation of the idler gear 143 that is driven by drive motor 111 passes to jackshaft 145 through clutch mechanism 151, and the rotation of this jackshaft 145 passes to instrument folder 113 through the 1st bevel gear 147 and the 2nd bevel gear 149.The 1st bevel gear 147 is arranged on the axial end of jackshaft 145 and becomes one with it.With the 2nd bevel gear 149 of the 1st bevel gear 147 engagement be configured in cylinder 121 coaxial on, and with instrument folder 113 rotation integratedly.Jackshaft 145 disposes abreast with respect to the rotating shaft 111a of drive motor 111, with the axis quadrature of cylinder 121.The 1st above-mentioned bevel gear 147 is corresponding with " driven wheel " of the present invention, and the 2nd bevel gear 149 is corresponding with " driven gear " of the present invention.
Clutch mechanism 151 is engagement type clutches, and mainly by driving clutch 153 and constituting from dynamic clutch 155, described driving clutch 153 is installed on the jackshaft 145 with the state of matched in clearance; Described being mounted to respect to jackshaft 145 by spline fitted from dynamic clutch 155 can be slided in the axial direction, and can with jackshaft 145 one rotation in a circumferential direction.Driving clutch 153 combines with the idler gear 143 that is rotated by drive motor 111 through torque limiter 154, when drive motor 111 energisings drove, the rotary load that acts on the drill hammer 115 rotated with idler gear 143 one in the scope of the critical value of being set by torque limiter 154.Drive clutch 153 with relative in the axial direction, on opposite face, have pawl 153a, 155a respectively from dynamic clutch 155.Apply power by elastic force to driving clutch 153 sides from dynamic clutch 155 as the clutch spring 157 of afterburning assembly, by pawl 155a and the pawl 153a engagement (engaging) that drives clutch 153 from dynamic clutch 155, rotation is passed to jackshaft 145, when leaving driving clutch 153 from dynamic clutch 155 these clutch springs 157 of resistance, the engagement of pawl 153a, pawl 155a is disengaged, and the transmission of the rotation of jackshaft 145 is blocked.Switching controls about clutch mechanism 151 has narration hereinafter.
Electric hammer drill 101 has the pattern switching mechanism 161 of the pattern of switching shock drill bit 115.Pattern switching mechanism 161 is corresponding with " pattern switching mechanism " of the present invention.Pattern switching mechanism 161 can make drill hammer 115 carry out percussion action and spinning movement composite-like action impact, drill jig formula and make drill hammer 115 carry out switching between the conflicting model of percussion action.
As Fig. 2～shown in Figure 3, pattern switching mechanism 161 mainly is made of pattern handover operation member 163, according to the handover operation of this pattern handover operation member 163, the engagement that comes solenoidoperated cluthes mechanism 151 through clutch switching mechanism 171.Clutch switching mechanism 171 is corresponding with " connect mechanism " of the present invention.Pattern handover operation member 163 is configured in the outside (upside among Fig. 1) of the upper surface of motor casing 105, and the operator can operate on it.That is, pattern handover operation member 163 is seized gas 121 on both sides by the arms and is configured in the opposition side of clutch mechanism 151.Pattern handover operation member 163 is made of the plectane 163a of ribbon gymnastics effect handle 163b, and is installed on the motor casing 105, can carry out rotating operation to it in horizontal plane.Operation does not illustrate with handle 163b is special, but the upper surface upper edge diametric(al) that is provided in plectane 163a is extended shape, and an end of bearing of trend is made into a thin shape and as the switching position instruction unit, in motor casing 105 sides, express 2 kinds of above-mentioned mode position with the spacing identification of regulation in a circumferential direction, that is, percussion drill mode position, conflicting model position.In addition in the lower face side of the plectane 163a of pattern handover operation member 163, the position of departing from from the pivot of this plectane 163a is provided with the cam pin 163d that makes 171 actions of clutch switching mechanism.
When pattern handover operation member 163 carried out the operation of pattern switching, the change action of clutch switching mechanism 171 passed to clutch mechanism 151.As shown in Figures 2 and 3, clutch switching mechanism 171 mainly comprises: frame member 173, ring element 175 (with reference to Fig. 4 and Fig. 5), wedge-like cam member 177, described frame member 173 is コ word shape when overlooking, when in horizontal plane, pattern handover operation member 163 being carried out rotating operation, rotational action according to cam pin 163d, described frame member 173 moves at axially (that is, drill hammer 115 is axial) last straight line of cylinder 121; Described ring element 175 is connected with described frame member 173; Described cam member 177 is arranged on the also engagement of solenoidoperated cluthes mechanism 151 on this ring element 175.Ring element 175 is corresponding with " cylindrical member " among the present invention.
Frame member 173 is overlooked and roughly is the コ shape, be configured in the crank chamber in the crank shell 106, and its base portion side is connected with pattern handover operation member 163 the approximate horizontal shape.Promptly, frame member 173 by the spatial portion of the base portion of the slotted hole 173a (Fig. 1～Fig. 3 represents with section) with cam pin 163d engaging and the outer regions by cylinder 121 and to ring element 175 extend about 2 173b of foot form the コ font, move according to the rotational action of cam pin 163d axial linearity along gas 121.Frame member 173 is directed to through ways 172 (in Fig. 1～Fig. 3 expression local), thus linearity move.
Ring element 175 is configured in the periphery of instrument folder 113, can move to the axis direction of this instrument folder 113.Ring element 175 has from an axial end 2 pin sheets 176 (with reference to Fig. 5) towards about 173 extensions of frame member, and the front end of this pin sheet 176 is connected with the 173b of foot of frame member 173.Thus, frame member 173 and ring element 175 move horizontally to the axis direction of cylinder 121 integratedly.Constitute " relaying member " of the present invention by above-mentioned frame member 173 and pin sheet 176.Lower face side at ring element 175 is provided with cam member 177, moves integratedly with this ring element 175.Cam member 177 switches under the state of percussion drill pattern at pattern handover operation member 163, leave the clutch change action member 159 (with reference to Fig. 2) of clutch mechanism 151, under this state, from the pawl 155a and the pawl 153a engagement that drives clutch 153 of dynamic clutch 155.When pattern handover operation member 163 is switched to the 1st conflicting model or the 2nd conflicting model, cam member 177 by inclined plane part 177a to clutch change action member 159 pressurization (with reference to Fig. 3), make from dynamic clutch 155 resistance clutch springs 157 and leave through this clutch change action member 159 to drive clutch 153, thereby remove the engagement of pawl 153a, 155a.On the cam surface side (with clutch change action member 159 contact surface side) of cam member 177, cover plate 178 as the iron plate system (metal system) that strengthens usefulness, guarantee the smoothness of sliding action thus, seek the raising of durability simultaneously.
As shown in Figure 4 and Figure 5, on an axial end of ring element 175, setting spreads all over the pawl 175a in full week, this pawl 175a when pattern handover operation member 163 switches to conflicting model by with an axial end that is arranged on the 2nd bevel gear 149 on pawl 149a (, limit rotating freely of the 2nd bevel gear with reference to the engagement of Fig. 1～Fig. 3).Thus, be limited under the conflicting model rotating freely of instrument folder 113 when driving drill hammer 115 and drill hammer 115, carry out so-called variable latching.In order to realize being used for the mutual smooth and easy engagement of pawl 175a, 149a of this lock variable, frame member 173 applies power by the spring 174 between this frame member 173 and ways 172 to the direction of pawl 175a, 149a engagement, and the play of the regulation relevant with moving direction is set between slotted hole 173a and cam pin 163d.
The electric hammer drill 101 of present embodiment constitutes as described above, and effect and the using method to electric hammer drill 101 describes below.
As shown in Figure 2, when the user with pattern handover operation member 163 rotary manipulations to impacting, on the drill jig formula position time, the frame member 173 of clutch switching mechanism 171 being moved to the front (drill hammer 115 sides) of diagram left.Thus, ring element 175 and cam member 177 all move to equidirectional, and cam member 177 leaves clutch change action member 159.For this reason, keep from dynamic clutch 155 and the pawl 155a that drives clutch 153, the engagement of 153a by the elastic force of clutch spring 157.
Under such state, when pull the trigger 123 that is arranged on the handle 109 switch on drive this drive motor 111 after, the passive movement mapping device 131 that rotatablely moves of drive motor 111 is transformed into rectilinear motion, and the piston 137 of this motion changing mechanism 131 carries out linear reciprocating motion in the thorax of cylinder 121.Then, follow the rectilinear motion of piston 137, the hammer 118 that constitutes impact components 117 is moved, through impulse member 119 rectilinear motion is passed to drill hammer 115 again through air spring.On the other hand, the rotatablely moving through Poewr transmission mechanism 141 of drive motor 111 passes to instrument folder 113 and drill hammer 115 as rotatablely moving, and wherein, the rotation on coaxial with cylinder 121 of described instrument folder 113 is free; Described drill hammer 115 remains under the confined state of rotation with respect to this instrument folder 113.That is, impacting, under the drill jig formula, driving drill hammer 115, thus the percussion drill operation that can stipulate work piece with the composite move of percussion action (percussion action) and spinning movement (hole and move).
Next, when pattern handover operation member 163 when the percussion drill mode position forwards the conflicting model position to, the frame member 173 of clutch switching mechanism 171 is moved towards right-hand rear portion side (handle 109 sides) of diagram, thus, ring element 175 and cam member 177 also move towards equidirectional, the inclined plane part 177a of this cam member 177 by with the mobile component of the direction of moving direction quadrature to 159 pressurizations of clutch change action member.Thus, clutch change action member 159 moves towards the axis direction of jackshaft 145, revolts clutch spring 157 and makes from dynamic clutch 155 and leave driving clutch 153, thereby remove the engagement of pawl 155a, 153a.For this reason, drill hammer 115 does not rotate (with reference to Fig. 3) under conflicting model.
When cocking 123 under such state is switched on this drive motor 111 of driving, rotatablely moving of drive motor 111 is transformed to rectilinear motion by motion changing mechanism 131, and, pass to drill hammer 115 as rectilinear motion via the hammer 118 and the impulse member 119 that constitute impact components 117.At this moment, because the engagement of the clutch mechanism 151 of Poewr transmission mechanism 141 is disengaged, so drill hammer 115 does not rotate.For this reason, under conflicting model, the impact operation that can only stipulate by the percussion action (percussion action) of drill hammer 115.
The electric hammer drill of present embodiment is the such form of axis quadrature that is configured to the axis and the cylinder 121 of drive motor 111.The below that the position of centre of gravity of such electric hammer drill 101 is positioned at the axis of cylinder 121 is positioned near the front side a little of axis of drive motor 111 simultaneously.Known this center of gravity is more away from the axis of cylinder 121, and is just big more along the vibration of fore-and-aft direction (axis direction of cylinder 121) or above-below direction (above-below direction of the paper among Fig. 1).
In the present embodiment, pattern switching mechanism 161 by operator's handover operation is configured in main part 103 upper surface side as cylinder 121 upper areas, on the other hand, configuration clutch mechanism 151 passes to clutch mechanism 151 to the change action of pattern handover operation member 163 through clutch switching mechanism 171 on the jackshaft 145 of the Poewr transmission mechanism 141 of the lower zone that is disposed at cylinder 121.That is, the member of formation relevant with the switching of the pattern of drill hammer 115 is configured to dispersedly the axis shape of gripper cylinder 121 up and down.Thus, in the prior art, the member of formation centralized configuration relevant and by comparison in a place with the switching of pattern, the present invention can make the axis side of the position of centre of gravity of electric hammer drill 101 near cylinder 121, its result is the vibration along fore-and-aft direction or above-below direction that produces in the time of can reducing the processing operation effectively.
In addition, adopt the structure that pattern switching mechanism 161 is configured in the upper surface side of main part 103, when holding handle 109 with one, no matter the another hand is which hand of the left hand or the right hand can be operated this pattern switching mechanism 161 like a cork.That is, compare, can irrespectively operate the switching of this pattern switching mechanism 161 like a cork, improved convenience with the convenient situation of operator's hand with the structure on the side that pattern switching mechanism 161 is configured in main part 103.
Have again, in order to make the axis of position of centre of gravity near cylinder 121, be configured in clutch mechanism 151 with cylinder 121 coaxial structures more favourable, but occasion in such structure, clutch mechanism 151 is because of being configured in the outer regions of cylinder 121, so maximize diametrically, and produced the unfavorable situation that weight increases.According to present embodiment, since clutch mechanism 151 be arranged on the jackshaft 145 of Poewr transmission mechanism 141 coaxial on, so can miniaturization clutch mechanism 151, in addition because configuration space is few, so help the overall compactization of electric hammer drill 101.
In addition, in the clutch switching mechanism 171 of present embodiment, configuration ring element 175 on the periphery of cylinder 121, simultaneously this be provided with on 715 the axis of gripper cylinder 121 and extend along this axis direction about 2 pin sheets 176, on this pin sheet 176, connect the frame member 173 of コ font.Thus, when switching operation modes handover operation member 163, owing to work to ring element 175 in its handover operation 2 places about the gripper cylinder axis, so this ring element 175 moves keeping under the state of balance with being stabilized, and then, can carry out the change action of clutch mechanism 151 reliably.
Have again, present embodiment has illustrated the occasion of the axis orthogonal configuration of the axis of drive motor 111 and cylinder 121, but for example also can be used for the axis of drive motor 111 and the parellel arranged electric hammer drill of axis of cylinder 121, promptly, motion changing mechanism as motion that the rotation output transform of drive motor 111 is in line also can adopt the electric hammer drill that uses wobbler mechanism.Occasion at the electric hammer drill that uses wobbler mechanism, by Poewr transmission mechanism 141 rotation of drive motor 111 is passed to drill hammer 115, the rotation of this Poewr transmission mechanism 141, promptly, the axis of idler gear 143 is set for parallel with the axis of drive motor 111 with cylinder 121 respectively, and 3 become configured in parallel.Even in this occasion, clutch mechanism 151 is set on the idler gear 143, when the pattern handover operation of pattern handover operation member 163, by intactly keeping the gear meshing in the Poewr transmission mechanism 141, can switch to and the rotation of drive motor 111 passed to the power delivery status of drill hammer 115 and block the power that rotation transmits and block state.
In addition, in the present embodiment,, illustrated and between impact, drill jig formula and conflicting model, carried out the occasion that pattern is switched, but also be not limited to this for the pattern of drill hammer 115.For example, also can be set in the drill mode that only is rotated action on the drill hammer 115 or the neutral mode of on drill hammer 115, not carrying out percussion action and spinning movement.Clutch switching mechanism 171 for engage or remove pawl 153a, the 155a of clutch mechanism 151 according to the handover operation of pattern handover operation member 163 is not limited to illustrated structure, for example also can change on linkage.
According to the aim of foregoing invention, can constitute the following examples.
(embodiment 1)
" as technical scheme 2 described electric hammer drills, it is characterized in that,
Above-mentioned cylindrical member when above-mentioned pattern switching mechanism switches to conflicting model, by being fastened on the member that rotatablely moves with above-mentioned tool bit, limits rotating freely of this tool bit " on.
Adopt embodiment 1 described invention, when switching to conflicting model, owing to can limit rotating freely of tool bit, so suppressed the rash action (floating) of this tool bit when only processing operation, thereby when certain direction orientation tool drill bit is processed operation, be effective with percussion action driven tool drill bit.So-called " member that rotatablely moves with tool bit " is meant the 2nd bevel gear 149 or instrument folder 113 etc.
(embodiment 2)
" as technical scheme 2 or embodiment 1 described electric hammer drill, it is characterized in that,
Above-mentioned cylindrical member be configured in above-mentioned cylinder coaxial on, wherein, thereby the above-mentioned relaying member that the above-mentioned cylinder of clamping is configured in these cylinder both sides links with above-mentioned cylindrical member on by the axis of this cylinder and the straight line that radially extends.”
Adopt embodiment 2 described inventions, by the coupling position of cylindrical member and relaying member being set in as described above (the maximum state of distance of each coupling position that is disposed when promptly being arranged to seize cylinder on both sides by the arms) on the straight line by the axis of cylinder and radially extension, when according to the pattern handover operation of pattern switching mechanism, cylindrical member during through the relaying member and to the moving axially of cylinder, be difficult to produce and make the power of cylindrical member, thereby cylindrical member is moved point-blank at the axis direction of stable status lower edge cylinder around the rotation of the straight line of crosscut cylinder-bore axis.

Claims (3)

1. electric hammer drill is characterized in that having:
Main part;
Be housed in the motor in the aforementioned body portion;
Be housed in the tool bit of the front end area of aforementioned body portion;
Along the axial linear movement of above-mentioned tool bit, and make this tool bit carry out impact of percussion action thus;
Accommodate the cylinder of above-mentioned impact slidably;
Export by the rotation of above-mentioned motor and to make straight-line the 1st Poewr transmission mechanism of above-mentioned impact;
Have the rotation delivery areas that forms by driven wheel and driven gear engagement, and make 2nd power drive mechanism of above-mentioned tool bit around axis rotation by the rotation output of above-mentioned motor;
Can block the powershift mechanism of switching between the state at power delivery status and power, in above-mentioned power delivery status, keep the above-mentioned driven wheel of above-mentioned the 2nd Poewr transmission mechanism and driven gear engagement, simultaneously the rotation of above-mentioned motor side is delivered to above-mentioned tool bit side, block the transmission that will rotate in the state at above-mentioned power and block;
Be configured in the upper surface side of aforementioned body portion, with the percussion drill pattern of the above-mentioned tool bit of action drives that percussion action and spinning movement are composited with only drive between the conflicting model of above-mentioned tool bit and carry out the pattern switching mechanism that pattern is switched with percussion action;
Be configured in the bindiny mechanism between above-mentioned pattern switching mechanism and the above-mentioned powershift mechanism, when this bindiny mechanism is switched to the percussion drill pattern at above-mentioned pattern switching mechanism, make above-mentioned powershift mechanism switch to power delivery status, when above-mentioned pattern switching mechanism is switched to conflicting model, make above-mentioned powershift mechanism switch to the bindiny mechanism that power blocks state
Above-mentioned bindiny mechanism extends along above-mentioned cylinder side face, and the axis direction of above-mentioned cylinder is passed to above-mentioned powershift mechanism as direction of action and the pattern change action of above-mentioned pattern switching mechanism.
2. electric hammer drill as claimed in claim 1 is characterized in that,
Above-mentioned connect mechanism, has cylindrical member, this tubular object is configured to surround above-mentioned cylinder state on every side, and can moving axially along this cylinder, and, with above-mentioned cylinder axially as the pattern change action of the above-mentioned pattern switching mechanism of direction of action, pass to above-mentioned cylindrical member through holding a plurality of relaying members of above-mentioned cylinder arrangement under the arm in these cylinder both sides.
3. electric hammer drill as claimed in claim 2 is characterized in that,
Above-mentioned cylindrical member has cam member, this cam member is with above-mentioned cylindrical member during along the moving axially of above-mentioned cylinder, by with the mobile component of the direction of this axial quadrature above-mentioned powershift mechanism being switched to power delivery status or power blocks state.
CNB200510064739XA 2004-07-20 2005-04-18 Electric hammer drill Expired - Fee Related CN100366397C (en)

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JP2004212043A JP4515181B2 (en) 2004-07-20 2004-07-20 Electric hammer drill
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JP (1) JP4515181B2 (en)
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DE102005033672A1 (en) 2006-02-23
CN100366397C (en) 2008-02-06
JP2006026854A (en) 2006-02-02
US7383893B2 (en) 2008-06-10
DE102005033672B4 (en) 2009-04-23
US20060032645A1 (en) 2006-02-16
JP4515181B2 (en) 2010-07-28

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